<template>
  <section class="todoapp">
    <TodoHeader 
    @addName="addName"/>
    <TodoMain :list='showList'
    @del ="del"
    @changeIsAll ="changeIsAll"
    @change="change"
    />
    <TodoFooter
    @showClear="showClear"
    @changeAll ='changeAll'
    :list='showList' />
  </section>
</template>

<script>
import TodoHeader from "./components/TodoHeader.vue";
import TodoMain from "./components/TodoMain.vue";
import TodoFooter from "./components/TodoFooter.vue";
export default {
  components: {
    TodoHeader,
    TodoMain,
    TodoFooter,
  },
  data() {
    return {
    //   list: [
    //   { id: 1, name: '吃饭', isDone: true },
    //   { id: 2, name: '睡觉', isDone: false },
    //   { id: 3, name: '打豆豆', isDone: true }
    // ],
     
    list: JSON.parse(localStorage.getItem('list')|| '[]') ,
    type:'all'
    }
  },
  methods : {
    del(id) {
      const index =this.list.findIndex(item => item.id === id)
      this.list.splice(index,1)
    },
    change(id) {
    const obj =  this.list.find(item => item.id === id)
    obj.isDone = !obj.isDone
    },
    addName(taskName) {
      this.list.push({
        id:Date.now(),
        name:taskName,
        isDone:false
      })
    },
    showClear() {
      this.list =this.list.filter(item => !item.isDone)
    },
     changeAll(type) {
    this.type=type
  },
  changeIsAll(val) {
    this.list.forEach(item => item.isDone =val)
  }
  },
 
 computed : {
  showList() {
    if(this.type === 'all') {
      return this.list
    }else if (this.type === 'active') {
      return this.list.filter(item => !item.isDone )
    }else {
      return this.list.filter(item => item.isDone )
    }
  }
 },
 watch : {
  list : {
    deep : true,
    handler() {
      localStorage.setItem('list',JSON.stringify(this.list))
    }
  }
 }
};
</script>

<style></style>
